CN210599661U

CN210599661U - Hydraulic pushing equipment

Info

Publication number: CN210599661U
Application number: CN201921606173.2U
Authority: CN
Inventors: 刘继同; 赵凡; 段启明; 李渊亮; 刘兆岭; 郭道华
Original assignee: Tai'an Lihua Hydraulic Equipment Co ltd
Current assignee: Tai'an Lihua Hydraulic Equipment Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-22
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a hydraulic pressure propelling movement equipment belongs to hydraulic equipment technical field. A hydraulic pushing-out device comprises a cylinder bottom, a cover cap, a cylinder barrel, a first piston and a piston rod, wherein the cylinder barrel is connected to the bottom wall of the cylinder bottom, the cylinder barrel is connected with the cover cap through a bolt, the first piston is connected to the inner wall of the cylinder barrel, the piston rod is connected to the inner wall of the first piston, the cylinder barrel is divided into a rod cavity and a rodless cavity by the first piston, a pressure valve is further connected to the outer wall of the cylinder barrel, the pressure valve is communicated with the rod cavity and the rodless cavity through a first connecting pipe, an elastic part is connected to the inner wall of the pressure valve, a second piston is connected to one end, away from the inner wall of the pressure valve, of the elastic part, an oil outlet is connected to the outer wall; the utility model discloses can realize alleviateing mechanical shock under the condition that does not occupy the pneumatic cylinder inner space to play better buffering effect to the pneumatic cylinder, and then play good guard action to the pneumatic cylinder.

Description

Hydraulic pushing equipment

Technical Field

The utility model relates to a hydraulic equipment technical field especially relates to a hydraulic pressure propelling movement equipment.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion (or swinging motion), has simple structure and reliable work, can remove a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to various mechanical hydraulic systems.

Through retrieval, chinese patent CN201621247276.0 discloses a hydraulic pushing-out device, which includes a cylinder body, a piston rod disposed in the cylinder body, a piston disposed at one end of the piston rod, and a cylinder cover disposed at an end of the cylinder body, wherein a sliding cavity is disposed at one end of the piston rod, a sliding rod is sleeved in the sliding cavity, a compression spring is sleeved on the sliding rod, one end of the sliding rod is connected with the piston, a first permanent magnet is embedded in an end of the piston, and a second permanent magnet with a polarity opposite to that of the first permanent magnet is disposed in the cylinder cover; the utility model discloses can realize lightening mechanical shock, the steady and increase buffer power's of buffering purpose.

However, through adopting the spring to the effect of piston to playing the buffering, not only can occupy the inside space of pneumatic cylinder, the cracked condition can appear in the spring after the pneumatic cylinder uses for a long time moreover, consequently need carry out periodic replacement to the spring to this utility model has some weak points.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art and providing a hydraulic pushing equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hydraulic pushing device comprises a cylinder bottom, a cover cap, a cylinder barrel, a first piston and a piston rod, wherein the cylinder barrel is connected to the bottom wall of the cylinder bottom, one end of the cylinder barrel, which is far away from the cylinder bottom, is connected with the cap through a bolt, the first piston is connected on the inner wall of the cylinder barrel, the piston rod is connected to the inner wall of the first piston, the first piston divides the cylinder barrel into a rod cavity and a rodless cavity, the outer wall of the cylinder barrel is provided with a first oil inlet and outlet and a second oil inlet and outlet, the outer wall of the cylinder barrel is also connected with a pressure valve, the pressure valve is communicated with the rod cavity and the rodless cavity through a first connecting pipe, the inner wall of the pressure valve is connected with an elastic part, one end of the elastic element far away from the inner wall of the pressure valve is connected with a second piston, the outer wall of the pressure valve is connected with an oil outlet, the oil outlet is connected with a three-way valve, and the output end of the three-way valve is communicated with the rod cavity and the rodless cavity through a second connecting pipe.

Preferably, the thickness of the second piston is larger than the diameter of the oil outlet, and the outer walls of the second connecting pipes are connected with one-way valves.

Preferably, a threaded hole is drilled in the first piston outer wall, the piston rod is connected in the threaded hole in a threaded mode, the piston rod is fixedly connected to the first piston outer wall through a locking bolt, a first buffer groove is drilled in the inner wall of the cylinder bottom, and the diameter of the first buffer groove is slightly larger than that of the piston rod.

Preferably, a second buffer groove is formed in the side wall of the cap, and a boss matched with the second buffer groove is connected to the inner wall of the first piston.

Preferably, first annular grooves are formed in the side wall of the first piston and the side wall of the cap, and sealing rubber rings are connected in the first annular grooves.

Preferably, a second annular groove is drilled in the outer wall of the cap, and a dust screen is connected in the second annular groove.

Compared with the prior art, the utility model provides a hydraulic pressure propelling movement equipment possesses following beneficial effect:

1. the hydraulic pushing equipment is used for injecting external hydraulic oil into the cylinder barrel from the first oil inlet and outlet, so that the pressure in the rodless cavity is greater than the pressure in the rod cavity, the first piston is driven to slide towards the second oil inlet and outlet, the piston rod is pushed to extend out of the cover cap, meanwhile, the hydraulic oil in the rod cavity flows out of the second oil inlet and outlet, when the hydraulic oil is injected into the rodless cavity, the rodless cavity is communicated with the rodless cavity through the first connecting pipe, the hydraulic oil enters the pressure valve through the first connecting pipe, the second piston is pushed to slide, the elastic piece is arranged, so that the second piston slowly slides, when the first piston slides to the tail end of the cylinder barrel, the second piston slides through the oil outlet of the pressure valve, so that the second connecting pipe is communicated with the cylinder barrel, meanwhile, because the pressure in the rod cavity is less than the pressure in the rodless cavity, and then make the inside hydraulic oil of pressure valve that flows through flow through the second connecting pipe flow in have the pole intracavity portion, and then reduce the pressure differential between having the pole chamber and no pole chamber to make first piston motion slow down, until first piston motion to the stroke end, through the check valve that sets up, thereby avoid hydraulic oil to flow in through the direct no pole chamber of second connecting pipe and have the pole intracavity portion, and influence the normal of piston rod and stretch out.

2. The hydraulic pushing-out equipment has the advantages that when the piston rod retracts, the first piston can be buffered through the arranged pressure valve, so that the first piston slows down the movement, and further the hydraulic cylinder is protected, meanwhile, the first buffer groove is arranged on the inner wall of the cylinder bottom, when the piston rod retracts, the piston rod can extrude hydraulic oil in the first buffer groove, as the inner diameter of the first buffer is slightly larger than the diameter of the piston rod, the hydraulic oil in the first buffer groove can be extruded out through a gap between the first buffer groove and the piston rod, further a reaction to the first piston rod can be generated, further the movement of the first piston is slowed down, further the hydraulic cylinder is well protected, and similarly, when the first piston drives the piston rod to extend out, through the arranged second buffer groove and the boss, the first piston can be further buffered, so that the cylinder barrel is effectively protected.

3. This hydraulic pressure ejecting equipment through the sealed rubber ring that sets up to guarantee the leakproofness between first piston and block and the cylinder inner wall, through the dust screen that sets up, thereby avoid the dust to enter into inside the cylinder, influence the normal work of pneumatic cylinder.

The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can realize alleviateing mechanical shock under the condition that does not occupy the pneumatic cylinder inner space to play better buffering effect to the pneumatic cylinder, and then play good guard action to the pneumatic cylinder.

Drawings

Fig. 1 is a schematic structural diagram of a hydraulic pushing apparatus according to the present invention;

fig. 2 is a schematic structural diagram of a hydraulic pushing apparatus according to the present invention;

fig. 3 is a schematic structural diagram of a hydraulic pushing apparatus according to the present invention;

fig. 4 is a cross-sectional view of a hydraulic pushing apparatus according to the present invention;

fig. 5 is an enlarged view of a portion a in fig. 4 of a hydraulic pushing apparatus according to the present invention.

In the figure: 1. a cylinder bottom; 101. a first buffer tank; 2. capping; 201. a dust screen; 3. a cylinder barrel; 301. a first oil inlet and outlet; 302. a second oil inlet and outlet; 4. a first piston; 401. a piston rod; 402. locking the bolt; 403. sealing the rubber ring; 404. a second buffer tank; 405. a boss; 5. a pressure valve; 501. an elastic member; 502. a second piston; 503. a three-way valve; 504. a first connecting pipe; 505. a second connecting pipe; 506. a one-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-5, a hydraulic pushing-out device includes a cylinder bottom 1, a cap 2, a cylinder barrel 3, a first piston 4 and a piston rod 401, the cylinder barrel 3 is connected to the bottom wall of the cylinder bottom 1, one end of the cylinder barrel 3 far away from the cylinder bottom 1 is connected to the cap 2 through a bolt, the first piston 4 is connected to the inner wall of the cylinder barrel 3, the piston rod 401 is connected to the inner wall of the first piston 4, the cylinder barrel 3 is divided into a rod cavity and a rodless cavity by the first piston 4, a first oil inlet and outlet 301 and a second oil inlet and outlet 302 are arranged on the outer wall of the cylinder barrel 3, a pressure valve 5 is further connected to the outer wall of the cylinder barrel 3, the pressure valve 5 is communicated with the rod cavity and the rodless cavity through a first connecting pipe 504, an elastic member 501 is connected to the inner wall of the pressure valve 5, one end of the elastic member 501 far away from the inner wall of the, the output end of the three-way valve 503 is communicated with the rod chamber and the rodless chamber through a second connecting pipe 505.

Referring to fig. 1 to 5, the thickness of the second piston 502 is larger than the diameter of the oil outlet, and the outer walls of the second connecting pipes 505 are connected with one-way valves 506.

When the hydraulic cylinder is used, external hydraulic oil is injected into the cylinder 3 from the first oil inlet and outlet 301, so that the pressure in the rodless cavity is greater than the pressure in the rodless cavity, the first piston 4 is driven to slide towards the second oil inlet and outlet 302, the piston rod 401 is pushed to extend out of the cap 2, meanwhile, the hydraulic oil in the rod cavity flows out of the second oil inlet and outlet 302, when the hydraulic oil is injected into the rodless cavity, the first connecting pipe 504 is communicated with the rodless cavity, the hydraulic oil enters the pressure valve 5 through the first connecting pipe 504, the second piston 502 is pushed to slide, the elastic piece 501 is arranged, so that the second piston 502 slowly slides, when the first piston 4 slides to the tail end of the cylinder 3, the second piston 502 slides through the oil outlet of the pressure valve 5, so that the second connecting pipe 505 is communicated with the cylinder 3, and meanwhile, because the pressure in the rod cavity is less than the pressure in the rodless cavity, and then make the inside hydraulic oil of pressure valve 5 that flows through flow into have the pole intracavity portion through second connecting pipe 505, and then reduce the pressure differential between having the pole chamber and the rodless chamber to make first piston 4 motion slow down, until first piston 4 moves to the stroke end, through the check valve 506 that sets up, thereby avoid hydraulic oil to flow into through the direct rodless chamber of second connecting pipe 505 and have the pole intracavity portion, and influence the normal of piston rod 401 and stretch out.

Referring to fig. 4, a threaded hole is drilled in the outer wall of the first piston 4, a piston rod 401 is screwed in the threaded hole, the piston rod 401 is fixedly connected to the outer wall of the first piston 4 by a locking bolt 402, and a first buffer groove 101 is drilled in the inner wall of the cylinder bottom 1, and the diameter of the first buffer groove 101 is slightly larger than that of the piston rod 401.

Referring to fig. 4, a second buffer groove 404 is cut in the sidewall of the cap 2, and a boss 405 matching with the second buffer groove 404 is connected to the inner wall of the first piston 4.

When the piston rod 401 retracts, the first piston 4 is buffered through the arranged pressure valve 5, so that the first piston 4 slows down the movement, and the hydraulic cylinder is protected, meanwhile, the first buffer groove 101 is arranged on the inner wall of the cylinder bottom 1, when the piston rod 401 retracts, the piston rod 401 extrudes the hydraulic oil in the first buffer groove 101, because the inner diameter of the first buffer groove 101 is slightly larger than the diameter of the piston rod 401, the hydraulic oil in the first buffer groove 101 is extruded through a gap between the first buffer groove 101 and the piston rod 401, and a reaction on the piston rod 401 is generated, so that the movement of the first piston 4 is further slowed down, and the hydraulic cylinder is further protected well, and similarly, when the piston rod 401 is driven by the first piston 4 to extend, through the arranged second buffer groove 404 and the boss 405, the first piston 4 is also further cushioned, and the cylinder 3 is effectively protected.

Referring to fig. 4, first annular grooves are bored in both the side wall of the first piston 4 and the side wall of the cap 2, and a packing 403 is attached to the first annular grooves.

Referring to fig. 4, a second annular groove is bored in the outer wall of the cap 2, and a dust screen 201 is connected to the second annular groove.

Through the sealed rubber ring 403 who sets up to guarantee the leakproofness between first piston 4 and block 2 and the cylinder 3 inner wall, through the dust screen 201 that sets up, thereby avoid the dust to enter into inside the cylinder 3, influence the normal work of pneumatic cylinder.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A hydraulic pushing-out device comprises a cylinder bottom (1), a cover cap (2), a cylinder barrel (3), a first piston (4) and a piston rod (401), and is characterized in that the cylinder barrel (3) is connected to the bottom wall of the cylinder bottom (1), one end, far away from the cylinder bottom (1), of the cylinder barrel (3) is connected with the cover cap (2) through a bolt, the first piston (4) is connected to the inner wall of the cylinder barrel (3), the piston rod (401) is connected to the inner wall of the first piston (4), the cylinder barrel (3) is divided into a rod cavity and a rodless cavity by the first piston (4), a first oil inlet and outlet (301) and a second oil inlet and outlet (302) are arranged on the outer wall of the cylinder barrel (3), a pressure valve (5) is further connected to the outer wall of the cylinder barrel (3), the pressure valve (5) is communicated with the rod cavity and the rodless cavity through a first connecting pipe (504), an elastic piece (501) is connected to the inner wall of the pressure valve, one end, far away from the inner wall of the pressure valve (5), of the elastic piece (501) is connected with a second piston (502), an oil outlet is connected to the outer wall of the pressure valve (5), a three-way valve (503) is connected to the oil outlet, and the output end of the three-way valve (503) is communicated with the rod cavity and the rodless cavity through a second connecting pipe (505).

2. A hydraulic push-out apparatus according to claim 1, wherein the thickness of the second piston (502) is larger than the diameter of the outlet port, and a one-way valve (506) is connected to the outer wall of the second connecting pipe (505).

3. A hydraulic push-out apparatus according to claim 1, wherein the first piston (4) is provided with a threaded hole on its outer wall, the piston rod (401) is screwed into the threaded hole, and the piston rod (401) is fixedly connected to the outer wall of the first piston (4) by a locking bolt (402), the inner wall of the cylinder bottom (1) is provided with a first buffer groove (101), and the diameter of the first buffer groove (101) is slightly larger than that of the piston rod (401).

4. A hydraulic push-out device according to claim 3, characterised in that the cap (2) has a second buffer groove (404) cut into its side wall, and that the first piston (4) has a boss (405) attached to its inner wall that matches the second buffer groove (404).

5. Hydraulic ejection device according to claim 1, characterized in that first annular grooves are cut on the side wall of the first piston (4) and on the side wall of the cap (2), inside which sealing gaskets (403) are connected.

6. Hydraulic ejection device according to claim 5, characterized in that a second annular groove is cut in the outer wall of the cap (2), in which a dust screen (201) is connected.